1876561 has 4 divisors (see below), whose sum is σ = 1941300. Its totient is φ = 1811824.

The previous prime is 1876559. The next prime is 1876597. The reversal of 1876561 is 1656781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1336336 + 540225 = 1156^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1876561 - 2¹ = 1876559 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1876561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1876541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32326 + ... + 32383.

It is an arithmetic number, because the mean of its divisors is an integer number (485325).

2^1876561 is an apocalyptic number.

It is an amenable number.

1876561 is a deficient number, since it is larger than the sum of its proper divisors (64739).

1876561 is an equidigital number, since it uses as much as digits as its factorization.

1876561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64738.

The product of its digits is 10080, while the sum is 34.

The square root of 1876561 is about 1369.8762717852. The cubic root of 1876561 is about 123.3448142871.

The spelling of 1876561 in words is "one million, eight hundred seventy-six thousand, five hundred sixty-one".